Controlling-switch for motor-operated doors.



No. 825,393. PATENTED JULY 10, 1906.

J. W. KBLLOGG. CONTROLLING SWITCH POR MOTOR OPERATED DOORS.

APPLICATION FILED JUNB20,1904.

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PATENTED JULY 10, 1906.

J. W. KELLOGG. CONTROLLING SWITCH FOR MOTOR OPERATED DOORS.

APPLICATION FILED JUNE 2O 1904.

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WITNESSES:

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UNITED sTATEs PATENT orrron.

JAMES 7V. KELLOGG OF SCHENECTADY, NEW YORK, ASSIG-NOR TO GEN- ERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

Specification of Letters Patent.

Patented July 10, 1906.

Application filed June 20, 1904. Serial No. 213,254.

, useful Improvements in Controlling-Switches for Motor-Operated Doors, of which the following is a specification.

My invention relates to controllers for electric circuits, and is particularly applicable to systems employing local and distant control.

In an application for United States Letters Patent, Serial No. 208,892, filed by Arthur A. Buck May 20, 1904, is described a system. of control for motor-operated bulkhead-doors and similar devices. In this system a controlling-switch for the motor is placed at each door, which is arranged to connect the motor for raising and lowering the door. A solenoid is provided for moving each switch to the proper position to connect the motor for lowering the door. By means of these solenoids a number of doors may be closed from a distant point. The switch is furthermore arranged so that it may be moved manually to either position for raising or low-' oring the door witho ut disturbing the circuit of the solenoid. In this way a man at the door can take the control away from the distant station temporarily, so as to'raise the door; but when he releases the switch it will return to the position for lowering the door provided the circuit of the solenoid has been closed at the distant point.

The controlling-switch disclosed in the above application is arranged with the positions for raising and lowering the control on opposite sides of the off position ofthe switch. This arrangement necessitates moving the controller t rough the off position when the switch has been moved to lowering position by means of the distant control and it is desired to move the switch manually to raising position. Since the manual operation of the switch must be performed against the tension of a spring when the solenoid has been energized by the distantcontrol system, moving the switch through the off position requires the expenditure of a considerable amount of force.

The object of my invention is to so arrange the switch and its controlling means that it is necessary to move it only half the distance that is required with the arrangement of the control of controller C are shown in above application when it is desired to move it from lowering to raisin position. I accomplish this by placing oth positions on the same side of the off position and by rearranging the manual controllin means, so that the switch may be controlle both electrically from a distance and manually by an operator at the door in the same manner as in the arrangement of the above application.

My invention will best be understood by reference to the accompanying drawings, in which v Figure 1 shows an elevation of abulkheaddoor provided with a controlling-switch arranged in accordance with my invention. Fig. 2 shows a plan view of the same. Fig. 3 shows the controller moved to lowering position. Fig. 4 shows the controller moved to raising osition, and Fig. 5 shows-diagram-- matical the connections of a control system arrange in accordance with my invention.

Referring first to Figs. 1 and 2, M represents a motor carrying on its shaft the Worm W. This worm engages a gear G, which car ries on its shaft the pinion P. The pinion P engages'a rack R on the bulkhead-door D. Thus by the rotation of the motor M the door D may be raised and lowered. O represents a controller controlling the circuit of the motor M. The controllerC may be operated by the solenoid S or manually by the handle H. The connections between the solenoid S'and the controller C are as follows: The core of solenoid S engages the short arm of apivoted lever s, so that when solenoid S is energized the short arm of lever s is raised and the long arm depressed. s is a tensionspring engaging the short arm of lever s,

tending to hold the core of solenoid S at its lowest position and to keep the long arm of lever s raised. When solenoid S is deenergized and the long arm of pivoted lever s is held in its raised position by the spring, the controller C is in its off position unless manually moved therefrom. This is shown in dotted lines in Fig. 1. The connections for manual Figs. 3 and 4. The handle H is rigidly secured to the controller-shaft and carries an extension M, which is connected to the lever h by means of the tension-spring h. When the handle H is released, the spring it brings the extension it into engagement with the lever h, as shown in Figs. 1 and 3. The controller is consequentlyre'turned to off position or to part passing from contact 0 through the arlowering position according as solenoid S is denergized or energized. Solenoid S, by means of the pivoted lever 8, determines the position of arm h,.and consequently the position to which the controller returns when re leased by handle-H".

. With the parts in the position shown in Fig. 1 if solenoid Sis energized the long arm of lever s will be depressed, as has been heretofore explained, and arm it will be pushed down into the position shown in Fig. 3. Arm .H carries the extension k along with it, ro-

' 3., If while the controller. is in this position a man" at the door desires to raise the door, he

can do so by rotating the handle H into the position shown'in Fig. 4. This rotation is opposed by the tension-spring h; but since the contacts for raising and lowering the door are laced side b side instead of on opposite si es of the o I position the-force re-v quired for rotating the controller from'lowering to raising position may be comparatively small.

Referring again to Fig. 1, B represents a spring-actuated switch which, when the door is raised, is held b spring I) in en agement with the contact When the 001 D is closed ,-however, as shown in Fig. 1, the stop or pin b,carried by the door, moves switch B out of engagement with the contact If. This,-

as will be seen, acts to open the circuit of the motor when the controlling-switch is in its lowering position.

Referring now toFig. 5', the connections of the controlling-switch and of the system will vices.

be described. C Ct represent two controlling-switches of the type heretofore described.

a a represent the mains, from which is ob' tained the current for operating the motors. These mains are energized b any suitable source of current as A, M M represent the motors for two doors. S S represent the 1 controlling-solenoids for the distant control,

station, switch E is closed, closing the. circuit of solenoid S. Controlling-switch C is thereby moved to bring the lower set of movable contacts into engagement with the station-v ary .contact fingers. The circuit is then completed as follows: line-wire a to contact o contact a, through field of motor M, contacts. Here the current divides, part pass, ing from contact-c through resistance 1' and mature of motor M. From the junction of resistance 1' and armature of motor M the opens the motor-circuit and at the same time closes the circuit of a signaling device L to indicate to the operator at the distant station that the door is closed. The purpose of the resistance 1- in shunt to the armature M is to give the motor a strong field, so as to prevent its racing while the door is lowering and also to give it a strong torque for forcing the .door into closed position. If while the solenoid S isenergized for the purpose of closing thedoor it is desired by a man at the door to raise the door, controller C is moved manuall in a manner that has been described' eretofore to bring the upper set of movable contacts into engagement with the contact-fingers. It will be seen by tracing out'the circuit that the direction of current through the motor-field is reversed, while the resistance r is no longer in shunt to the armature. Furthermore, the switch B is no longer included in the motor-circuit. When the handle of controller C is released by. the operator, the switch returns either to off po sition or to lowering position, according as solenoid S is deenergized or energized. With the switch in the off position it is obvious that the controller may be movedmanually to lower the door or to raise it. In other words, the distant control in no way interferes with the manualcontrol at the door.

Switch B in addition to the function of breaking the motor-circuit when the door is closed, so as to prevent useless heating of the motor, enables the controlling-switch to be moved through the lowering position to raising position when the door is closed Without startin up the motor until-raisin position is reache since when the door 'is cfised switch B is open and the controllingeswitch in its lowering position cannot close the motor-circuit.

Thecontrollin -s witch' and its circuits may be greatly modi ed without departing from the spirit of my invention, and I aim in. the appended claims to cover all such modifications.

What I claim as new, and desire to secure by Letters Patent of the United States, is

1. In combination, a switch havin a plurality of operative positions on one side of its off position, means for holding said switch normally in off position, means controllable from a distance for moving said switch to an operative. osition, and connections between said switch? and said moving means adapted topermit the continued movement of said switch manually to another operative position.

2. In combination,..a switch havin a plurality of operative positions on one side 0 its off position, means for holding said switch normally in off osition, means controllable from a distance ibr moving said switch to an operative position, and connections'between said switch .and said moving means adapted to permit the continued movement of said switch manually to another operative posi-' tion without disturbing said moving means.

normally in off position, an electroma net op switch having a pluralit 3. In combination, a switch havin a lurality of operative positions on one sigeo f its off position, means for holding said switch normall in off osition, means controllable from a r istanceibr movi said switch to an operative position, and a exible connection between said switch and said moving means, whereby'the movement of the switch may be continued manuallyto another operative position. l Y

4. In combination, a switch havin 'a plurality of operative positions on one si e of its off position,'means for holding said switch eratively connected to said switch an adapted when energized to move said switch to an operative position, and manually-operated means for continuing the movement of'said switch to another operative position.

5. In combination, a manually-operated of operative positions'on one side of its 0 position, means for holding said switch normally in off position, and, means controllable from a distance for movingsaid switch into an operative position.

6. In combination with an electric motor, a

manually-operated reversing-switch havin both operative positions on the same side 0 its of! position, and means controllable from' a distance for moving saidswitch into an op,-

erativeposition.

7. In combination with an electric motor,

a reversing-switch having both 0 erative positions on t e same side OfltS 0 position, an

electroma net operatively connected to said;

switch an adapted to move it into the first operativeposition, meansat a distance for controllingthe circuit of said electromagnet', and means at the switch itself for manually operating said switch whether or not said magnet is energized.

.8. In comb1nat1on wlth a door, amotor for opening and closingsaid door, a reversingswitch for said motor havin both operative positions on the same sideoI its off position, the closing position being between the off and the opening positions, and a switch operated by said door and arranged to maintain'the vmotor-circuit broken when the door is closed until said reversing-switch is moved to its opening position.

9. .In combination with a door, a motor for o enin and closin said door a reversin in off position, and means contro lable from a distance for shifting said holding means to bring said switch to an operative position.

11. In combination, a switch havin a lurality'of operativei'positions on one sife' 0? its ofl' position, means for holding said switch normally inv its off position, manually-operated means for moving said switch to any of its operative positions, 'and means controllable from a distance and actin'gon said holding means to shift the position .to which the switch returns when manually released.

'12. In combination with an electric motor,

' a manually-operated reversin -switch havin both operative positions out o same side 0 its off position, means for holdin said switch in off position, means controllab e from a distance vfor shifting said holding means to bring 'said switch to an operativeposition, and con' nections between said switch and said shiftingmeans adapted to ermit the continued movement of said switc manually to another operative position.

,- In witness whereof I have hereunto set m hand this-18th day of June, 1904.

JAMES w.- KELLOGG. "Witnesses:

' BENJAMIN B. HULL, HELEN ORFoRD. 

